| DATA
|
526, 2546, 8207, 23404, 60044, 144737, 334167, 755336, 1690491, 3781186, 8485355, 19144607, 43420578, 98930808, 226191116, 518462850, 1190424308, 2736380757, 6294485365, 14485586642, 33344734931, 76769227278, 176761167633
|
| EXAMPLE
|
Some solutions for n=4
..0..1..3....0..2..3....0..0..2....0..1..2....0..0..3....1..0..2....1..1..3
..0..0..2....0..0..1....0..0..0....1..1..1....3..3..3....1..0..2....1..0..0
..1..1..1....1..1..1....0..0..0....1..0..0....0..0..0....2..0..2....1..0..0
..0..0..0....0..0..0....1..1..0....2..1..1....2..2..2....2..0..0....1..0..0
..3..0..0....3..3..0....3..1..0....3..1..0....1..0..0....3..0..0....1..0..0
|